@User: I guess it's expecting some klayout database format. If you want to browse through the (traced) nets, you can try Tools -> Trace All Nets -> Hierarchical .

this may help, but I was hoping for cell instance name to debug this antenna violation

If you open the layout in magic and run

antennacheck

, it should highlight the violation. In klayout, you can also go to the locations reported (you need to divide them by 1000) by hitting Ctrl-G and inserting comma-separated coordinates.

handy shortcut, I was throwing darts with the track pad. thanks